Guest post by Christina Majoinen. I first learned the basics of critical thinking in a class called ‘Analysing Arguments’ as a fresh first-year university student. Every class was a revelation. As I learned what an argument was, and the various ways arguments could go wrong, I felt simultaneously grateful and angry. I was grateful that I had taken this class, grateful that I had the opportunity to learn to distinguish between appropriate evidence for a claim, and what looks like appropriate evidence at first glance but actually isn’t. I was angry, however, that nobody had taught me any of this before.